lungdata: Lung cancer data
Description
A case 1 interval-censored data set first presented in Hoel and Walberg (1972) and can be found in Sun (2006, page 6). In the study, 144 male RFM mice
were raised under two conditions: conventional environment (96 mice) and germfree environment (48 mice).
Each mouse was "sacrificed" at a random time to see if it had lung tumors. Time was measured in days.
Format
A matrix with 144 rows and 4 columns. Each row (L, R, status, treatment) corresponds to a mouse in the study.
L- left-points of observed intervals
R- right-points of observed intervals
status- censorship indicator: 1=left-censor and 0=right-censor
treatment- treatment indicator: 1=conventional environment, 2=germfree environment
Source
Hoel, D. G. and Walberg, H. E. (1972). Statistical analysis of survival experiments.
Journal of the National Cancer Institute 49 361-372. Sun, J. (2006). The Statistical Analysis of Interval-censored Failure Time Data. Springer, New York.